Question: A man stands on a frictionless platform that is rotating with an angular speed of 1.5 rev/s. His arms are outstretched, and he holds a

A man stands on a frictionless platform that is rotating with an angular speed of 1.5 rev/s. His arms are outstretched, and he holds a heavy weight in each hand. The moment of inertia of the man, the extended weights, and the platform is 6 kg ∙ m2. When the man pulls the weights inward toward his body, the moment of inertia decreases to 1.8 kg ∙ m2.

(a) What is the resulting angular speed of the platform?

(b) What is the change in kinetic energy of the system?

Step by Step Solution

★★★★★

3.39 Rating (180 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a dL dt 0 So f i I i I f fin 15 618 revs fin ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

10-P-M-A-M (248).docx

120 KBs Word File

Students Have Also Explored These Related Mechanics Questions!

A platform is rotating with an angular speed of 3.00 rad/s and an angular acceleration of 11.0 rad/s 2 . At a point on the platform that is 1.25 m from the axis of rotation, what is the magnitude of...

When a ceiling fan rotating with an angular speed of 3.66 rad/s is turned off, a frictional torque of 0.125 N # m slows it to a stop in 31.8 s. What is the moment of inertia of the fan?

A flywheel rotates with an angular speed of 25 rev/s. As it is brought to rest with a constant acceleration, it turns 50 rev. (a) What is the magnitude of the angular acceleration? (b) How much time...

A physics student is sitting on a frictionless platform that is rotating with an angular speed of wi = 1 . 1 rad / s . His arms are outstretched, and he is holding a heavy weight in each hand. The...

What are the angles a and b in the actual molecule of which this is a Lewis structure? H a C H H H a Note for advanced students: give the ideal angles, and don't worry about small differences from...

A man stands on a platform that is rotating (without friction) with an angular speed of 1.38 rev/s; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system...

A man stands at the center of a platform that rotates without friction with an angular speed of 3 . 9 7 rev / s . His arms are outstretched, and he holds a heavy weight in each hand. The moment of...

Hello. Could you please answer these questions? The answers are provided on the worksheet in bold and italics right next to their corresponding problems. The formulas are also provided below the...

A man stands at the center of a platform that rotates without friction with an angular speed of 2 . 5 7 rev / s . His arms are outstretched, and he holds a heavy weight in each hand. The moment of...

A man stands at the center of a platform that rotates without friction with an angular speed of 3 . 0 5 rev / s . His arms are outstretched, and he holds a heavy weight in each hand. The moment of...

Fill in the missing present values in the following table for an ordinaryannuity. Number of Payments or Annual Interest Rate Future Value AnnuityPresent Value Years 10 20 25 360 6% 12% 490 100...

Ming Chen began a professional practice on June 1 and plans to prepare financial statements at the end of each month. During June, Ming Chen (the owner) completed these transactions: a. Owner...

Payment of dividends to stockholders is considered a ( n ) : Multiple Choice : 1 8 : 0 6 Investing cash flow. erences Financing cash flow. Not a cash flow. Operating cash flow.

The circular disk is spinning about its own axis (y-axis) at the constant rate p = 10 rad/s. Simultaneously, the frame is rotating about the Z-axis at the constant rate = 4 rad/s. Calculate the...

Youre planning a semester in China, so you want to purchase a transformer to step the 220-V Chinese power down to 120 V to power your stereo. (a) If the transformers primary has 660 turns, how many...

The Gorman Group is a financial planning services firm owned and operated by Nicole Gorman. As of October 31, 20Y3, the end of the fiscal year, the accountant for The Gorman Group prepared an...

Have analysts made any significant changes to their forecasted earnings for Abercrombie & Fitch in the past few months? Access the Thomson ONE problems through the ThomsonNOW Web site. Use the...

Implement the sieve of Eratosthenes: a method for computing prime numbers, known to the ancient Greeks. This method computes all prime numbers up to n. Choose an n. First insert all numbers from 2 to...

Which of the following has the highest molar solubility? (a) MgF2, Ksp = 3.7 10-8; (b) MgCO3, Ksp = 3.5 10-8; (c) Mg3(PO4)2, Ksp = 1 10-25; (d) Li3PO4, Ksp = 3.2 10-.

A 42.0-cm-diameter wheel, consisting of a rim and six spokes, is constructed from a thin, rigid plastic material having a linear mass density of 25.0 g/cm. This wheel is released from rest at the top...

A high-wheel antique bicycle has a large front wheel with the foot-powered crank mounted on its axle and a small rear wheel turning independently of the front wheel; there is no chain connecting the...

In a lab experiment you let a uniform ball roll down a curved track. The ball starts from rest and rolls without slipping. While on the track, the ball descends a vertical distance h. The lower end...

Currently, a U.S. trader notes that in the 6-month forward market, the Japanese yen is selling at a premium (that is, you receive more dollars per yen in the forward market than you do in the spot...

A real estate investor has the following information on an apartment building: Purchase Price is $1,125,000 with acquisition costs of $50,000 33,600 leasable square feet Initial rent of $12/sq. ft....

5. Develop a process flow chart for fabrication of pressure sensor shown below. For each step, select appropriate tools and describe the process. Pt electrodes SiO2 Si Substrate (can -be bond at the...